Wasabi DX issues - backup games

Hi guys, sorry for starting another thread, I have searched through multiple threads but my problem seems to differ slightly from others and I would really appreciate some specific help.

I just installed my Wasabi DX at the weekend. As far as I know I have installed it correctly. I have set the pins to the PAL settings (All down but the 2nd one) as I have a PAL console. (Im over here in sunny Scotland )

I can access the Wasabi menu fine by clicking eject 3 times, I can also play original games no problem.

I cannot get the Wii to play backup games at all. I have burnt several PAL isos and get disc read errors every time, for the most part the wii doesnt even recognise what game it is. (The only game I have managed to get further in interestingly is an NTSC backup, this one was recognised, loaded and then got a disc read error after asking me to insert the nunchuck.)

My Wii is running 4.1 firmware and I have updated the chip to 2.0 beta.

The media I am using are Maxell DVD-R, single layer.

Sorry for rambling but hopefully someone can help me better with all the details. I would be very greatful if someone could advise me what to try next.